Hidden Magnetic Configuration in Epitaxial La1xSrxMnO3 Films

J.-S. Lee, D. A. Arena, P. Yu, C. S. Nelson, R. Fan, C. J. Kinane, S. Langridge, M. D. Rossell, R. Ramesh, and C.-C. Kao
Phys. Rev. Lett. 105, 257204 – Published 14 December 2010

Abstract

We present an unreported magnetic configuration in epitaxial La1xSrxMnO3 (x0.3) (LSMO) films grown on strontium titanate (STO). X-ray magnetic circular dichroism indicates that the remanent magnetic state of thick LSMO films is opposite to the direction of the applied magnetic field. Spectroscopic and scattering measurements reveal that the average Mn valence varies from mixed Mn3+/Mn4+ to an enriched Mn3+ region near the STO interface, resulting in a compressive lattice along the a, b axis and a possible electronic reconstruction in the Mn eg orbital (d3z2r2). This reconstruction may provide a mechanism for coupling the Mn3+ moments antiferromagnetically along the surface normal direction, and in turn may lead to the observed reversed magnetic configuration.

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  • Received 3 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.257204

© 2010 The American Physical Society

Authors & Affiliations

J.-S. Lee1, D. A. Arena1, P. Yu2, C. S. Nelson1, R. Fan3, C. J. Kinane3, S. Langridge3, M. D. Rossell4, R. Ramesh2,5, and C.-C. Kao6

  • 1National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Department of Physics, University of California, Berkeley, California 94720, USA
  • 3ISIS, Harwell Science and Innovation Campus, STFC, Oxon OX11 0QH, United Kingdom
  • 4National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 5Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 6Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

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Issue

Vol. 105, Iss. 25 — 17 December 2010

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